string strsql = "SELECT R_Id,R_Name From Basic";
DataSet ReturnDataSet1 = conne.ReturnDataSet(strsql);
//显示下拉菜单中
comboBox1.DataSource = ReturnDataSet1.Tables[0];
comboBox1.DisplayMember = "R_Name";
comboBox1.ValueMember = "R_Id";======
r_id r_name
102 ha1
233 ha2
334 hee
....
433 ha22
533 ha672
.....
我怎么让comboBox1默认选择433 ha22comboBox1.SelectedValue=433不行
comboBox1.Items.Count怎么等于0
DataSet ReturnDataSet1 = conne.ReturnDataSet(strsql);
//显示下拉菜单中
comboBox1.DataSource = ReturnDataSet1.Tables[0];
comboBox1.DisplayMember = "R_Name";
comboBox1.ValueMember = "R_Id";======
r_id r_name
102 ha1
233 ha2
334 hee
....
433 ha22
533 ha672
.....
我怎么让comboBox1默认选择433 ha22comboBox1.SelectedValue=433不行
comboBox1.Items.Count怎么等于0
那么 在你Form的构造函数里写 comboBox1.Selectedindex = 19;
{
if (thisDrv["R_Id"]=433)
{
ComboBox1.SelectedValue=thisDrv;
Break;
}
}